python-method.py

# Define TV class, notice class is an object too
class TV(object):
    def __init__(self, size)
        self.size = size
    # This is an instance method and it always bound to specific instance of TV class    
    def get_size(self):
        return self.size
    
# Try to call class method
TV.get_size(TV(40))
# or
TV(40).get_size()